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TI-2009-00845 Aliases CVE-2009-0887GHSA-p45g-44mp-mq74

Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM…

Priority LOW 33CWE-189Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Code execution
Confidentiality · integrity · availability
Complete · Complete · Complete
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.

Summary

Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a configuration file contains non-ASCII usernames, might allow remote attackers to cause a denial of service, and might allow remote authenticated users to obtain login access with a different user's non-ASCII username, via a login attempt.

Why it matters now

EPSS 0.01929 80th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 20

CPEVersionsRoleVendor
cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:*up to 1.0.3VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.1.0:*:*:*:*:*:*:*0.99.1.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.2.0:*:*:*:*:*:*:*0.99.2.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.2.1:*:*:*:*:*:*:*0.99.2.1VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.3.0:*:*:*:*:*:*:*0.99.3.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.4.0:*:*:*:*:*:*:*0.99.4.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.5.0:*:*:*:*:*:*:*0.99.5.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.6.0:*:*:*:*:*:*:*0.99.6.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.6.1:*:*:*:*:*:*:*0.99.6.1VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.6.2:*:*:*:*:*:*:*0.99.6.2VulnerableLinux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:* Versions up to 1.0.3 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.1.0:*:*:*:*:*:*:* Versions 0.99.1.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.2.0:*:*:*:*:*:*:* Versions 0.99.2.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.2.1:*:*:*:*:*:*:* Versions 0.99.2.1 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.3.0:*:*:*:*:*:*:* Versions 0.99.3.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.4.0:*:*:*:*:*:*:* Versions 0.99.4.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.5.0:*:*:*:*:*:*:* Versions 0.99.5.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.6.0:*:*:*:*:*:*:* Versions 0.99.6.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.6.1:*:*:*:*:*:*:* Versions 0.99.6.1 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.6.2:*:*:*:*:*:*:* Versions 0.99.6.2 Vulnerable ·Linux-PAM
Show 10 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:linux-pam:linux-pam:0.99.6.3:*:*:*:*:*:*:*0.99.6.3VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.7.0:*:*:*:*:*:*:*0.99.7.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.7.1:*:*:*:*:*:*:*0.99.7.1VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.8.0:*:*:*:*:*:*:*0.99.8.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.8.1:*:*:*:*:*:*:*0.99.8.1VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.9.0:*:*:*:*:*:*:*0.99.9.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:0.99.10.0:*:*:*:*:*:*:*0.99.10.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:1.0.0:*:*:*:*:*:*:*1.0.0VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:1.0.1:*:*:*:*:*:*:*1.0.1VulnerableLinux-PAM
cpe:2.3:a:linux-pam:linux-pam:1.0.2:*:*:*:*:*:*:*1.0.2VulnerableLinux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.6.3:*:*:*:*:*:*:* Versions 0.99.6.3 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.7.0:*:*:*:*:*:*:* Versions 0.99.7.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.7.1:*:*:*:*:*:*:* Versions 0.99.7.1 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.8.0:*:*:*:*:*:*:* Versions 0.99.8.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.8.1:*:*:*:*:*:*:* Versions 0.99.8.1 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.9.0:*:*:*:*:*:*:* Versions 0.99.9.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:0.99.10.0:*:*:*:*:*:*:* Versions 0.99.10.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:1.0.0:*:*:*:*:*:*:* Versions 1.0.0 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:1.0.1:*:*:*:*:*:*:* Versions 1.0.1 Vulnerable ·Linux-PAM
  • cpe:2.3:a:linux-pam:linux-pam:1.0.2:*:*:*:*:*:*:* Versions 1.0.2 Vulnerable ·Linux-PAM

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-0887
  2. 2026-10-03 Alias added: GHSA-p45g-44mp-mq74

References

Exploit 1

Advisory 3

Other 2

  • TI-2022-11097 The Linux-PAM package before 1.5.2-6.1 for openSUSE Tumbleweed allows authentication… CVSS 3.1CRITICAL 9.8
  • TI-2020-16865 Improper authentication in pam CVSS 3.1CRITICAL 9.8
  • TI-2015-02867 The _unix_run_helper_binary function in the pam_unix module in Linux-PAM (aka pam) before… CVSS 3.0MEDIUM 6.5
  • TI-2014-02069 Multiple directory traversal vulnerabilities in pam_timestamp.c in the pam_timestamp… CVSS 2.0MEDIUM 5.8
  • TI-2010-04431 The pam_env module in Linux-PAM (aka pam) 1.1.2 and earlier reads the .pam_environment… CVSS 2.0HIGH 7.2
  • TI-2010-03660 pam_namespace.c in the pam_namespace module in Linux-PAM (aka pam) before 1.1.3 uses the… CVSS 2.0MEDIUM 6.9
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences